USF is the only park to have horror nights in recent years. It was once at IOA and once at both parks but last year was just USF. The event usually runs from 8:00 to about 2:00 on peak nights 12:00 or 1:00 otherwise.

Right. I know it isn't at ioa I'm just wondering their hours cuz I'm heading to universal Orlando for 1 day on 9/27. I'm sure there will be HHN that night, but I'm trying to plan accordingly so I can get the most out of that day. So I'm thinking doing the studios during the day, and ioa in the afternoon/night. Which is why I wanna know when ioa is gonna close